naic.edunaic.edu/~tghosh/haat/patriotxpropx18mxantennasxvs2.doc · web viewcornell university dept...

Dr. Robert L BrownCornell UniversityDept of Astronomy502 Space Sciences BuildingCornell UniversityIthaca NY 14853USA

2nd Oct 2006

Budgetary proposal for Patriot Antenna Systems 18.3m Arecibo Antenna

Dear Bob

On behalf of Patriot Antenna Systems we are pleased to provide you with the following budgetary proposal an 18.3m sized Patriot high performance full motion, dual shaped cassegrain antennas, together with a description of Patriot’s engineering capabilities and experience.

The first of Patriot’s larger antennas has now been delivered to NASA for the DSN array project and is designed for use at up to 32 GHz. In its standard 12m form a precision Jack screw was used in elevation and a twin motor, torque biased, zero backlash gear drive system is used for azimuth however other configurations are also available. For this larger antenna a two motor gear drive system is proposed for elevation. Unprecedented 26 bit encoders are used for exceptional accuracy for pointing and tracking feedback together with a state of the art motor drive and control system.

Enclosed with this you will find a data sheet on the basic 18.3m design. The full range of Patriot’s new larger class antennas is 6.3m, 7.5m, 9.4m, 12.1m, 13.3m, 16.4m and 18.3m sizes.

We hope that this is sufficient to demonstrate Patriot Antenna Systems competitive advantages and capabilities and we look forward to working with you on this.

Yours sincerely

Peter ShieldFor Patriot Antenna Systems

452 Aime-Vincent Vaudreuil-Dorion, Quebec, J7V 5V5, Canada. Tel 450 424 5666 Fax 450 424 66111

In InterTronic Solutions Inc. I International Electronic Sourcing and Consultancy

Patriot Antenna Systems

Patriot heritage and Past performance

Patriot Antenna Systems is a world-class manufacturer of antenna systems and is based in Albion, Michigan, located 75 miles west of Detroit and 150 miles east of Chicago. This location, in the midst of the largest industrial manufacturing area in the world, provides Patriot with unparalleled access to a wide network of supporting subcontractors and transportation links. Patriot has a 300,000 square ft facility dedicated to the design and production of some of the most competitive and advanced antennas anywhere, with antenna sizes ranging from less than 1m up to over 16m in diameter. Full in house manufacturing facilities including advanced stretch and vacuum forming, in house antenna range, powder coating line for antennas, extensive metal stamping and pressing facilities, fully equipped CNC machining facilities, programmable laser cutter/welder and a large water jet cutter.Design tools include the use of all the latest mechanical design software as well as the latest RF antenna design software.

In addition to the advanced facilities Patriot Antennas Systems employees a staff of engineers and support personnel with all of the required expertise in Antenna RF, electrical and antenna mechanical engineering to provide a guarantee of successful project implementation. Some of these key staff have been previously involved with larger antennas than these for use at high frequencies and with a wide variety of mechanical control systems. Specific relevant staff experiences are as below:

Design, manufacture and installation of Offset, Prime Focus and Dual Reflector Optics

Design, manufacture and installation of antennas ranging from 1.2m to 100m in size

Design, manufacture and installation of Full Motion and High Wind antenna systems

Design/testing of L Band, S Band, C Band, Ku Band, DBS Band and Ka Band antennas and feed systems including dual band systems

Design, manufacture and installation of Beam Waveguide antenna systems Holographic, photogrametric and laser measurement of antenna surfaces Project Engineering and Management of contracts with values ranging from

$150k to $10M


Proprietary noticeThe data and prices contained within this document are the proprietary data of Patriot Antenna Systems Inc. Neither the document nor the information contained within shall be used, reproduced, or disclosed to others without the written authorization of Patriot Antenna Systems Inc.

Patriot Antenna Systems have extensive Ka band experience with more than 10,000 deployed Ka band small VSAT terminals and the first in the industry Ka band typeApproval. Patriot’s range of antennas includes 26 separate type approvals with more already applied for.

Patriots major communications programs and expertise including some specific examples:

Have designed and just delivered the NASA JPL, 12.192m 32GHz, DSN array prototype antenna. This antenna is depicted in this document: it uses a precision ball screw elevation jack system and a full motion, twin torque biased gear driven azimuth drive. High-resolution encoders and the latest technology motor drive amplifiers are used to achieve highly accurate pointing control for the system. This antenna is designed to be produced at a much lower than present industry standard cost on a recurring basis.

Have recently developed and delivered antennas including 6.3m, 7.5m , 9.4m commercial antennas

Pas-8 / Pas-2 Patriot provided 100-4.5 meter antennas, 200-3.8 meter antennas, and 1000-3.1 meter antennas with multi-beam feeds to program recipients located in the Pacific Ocean Region. Allowing them to look at both satellites.

Galaxy-IX Patriot provided 2000-3.8 meter antennas to program recipients in North America.

Galaxy-VII Patriot provided 5000-3.8 meter antennas for this program.

Pas-5 Patriot provided 2000-3.1 meter antennas to program recipients

AMC-1/4 (formerly GE-1/4) Patriot provided 1500-3.8 meter antennas with multi-beam feeds to allow broadcasters to access both of the AMC-1 and AMC-4 satellites.

Experience with using all the industries standard major subsystems and components such as control systems, De-icing systems, RF subsystems etc.

Patriot design and manufacture a full line of VSAT and flyaway antennas and have experience with the use of various motorized mounting systems including the AVL ROTOLOK system and conventional jackscrew types.

Experienced with NASA and military applications.


Patriots Key staff Resumes:

Mr. Jeff Mathie, President Patriot Antenna Systems

Responsible for strategic company direction and the present growth into full earth station antenna systems and larger tracking antennas -- recruiting a team of industry experts. Started Patriot Antenna Systems in 1991. Has grown Patriot organically and by making several acquisitions. Patriot has delivered over 100,000 larger aperture (over 3m) and over 900,000 total antenna systems.

Mr. Kerry Rudd, PE, Vice president Patriot Antenna Systems

15+ years with Vertex, Andrew and Weston. Management, R&D, design, analysis and field experience on earth station antennas ranging from 1.2m to 34m including fixed and mobile systems.

Dr. Mark Godwin, Consultant to Patriot Antennas

30+ years in RF engineering and telecommunications in both commercial and academic activities. RF design, analysis, testing and holographic measurement of large antenna surfaces. Numerous publications and awards including recognition by NASA for work done on the 70m Deep Space Network Antennas in preparation for communication with Voyager 2 as it passed Neptune.

Mr. Paul Wagler, Director of program management Patriot Antenna Systems

15+ years antenna experience. Previous experience with small to large aperture antenna programs with Viasat and Scientific Atlanta, responsible for all aspects of major program management in Patriot.

Mr. Peter Shield, President InterTronic Solutions

Sales and Marketing contact for all Canadian applications and other key accounts (NASA, and selected US Military contractors etc) for all Patriot Antenna Systems products. 30 years in senior aerospace engineering, marketing and business leadership positions.


Antenna Detailed Description

The antennas described herein are based on Patriot’s new standard large antenna family shown in the example commercial data sheet below. Standard commercial sizes are 6m, 7.5m, 9.4m, 11.1m, 12.1m, 13.2m 16.4m and 18.3m. These are all available with full motion 2 axis gear drive systems or in the smaller sizes with more economical ball screw jack drive systems or a combination optimized to the tracking requirements of each application.


Patriot Antennas 12m to 18m design shown with a jack drive elevation system


Patriot 12.1m Antenna under construction

Specifications for this 18.3m version

Environmental: As per commercial data sheet above

General Mechanical: As per commercial data sheet above and additional descriptions below:

Pointing accuracy target: 0.007 Degrees at 30MPH max wind

Reflector surface accuracy: 0.025 inches RMS all causes for 15 GHz applications and

Speed of movement: For this application we have offered our standard 3 Deg /sec max in Azimuth and 0.7 Deg/sec (¼ of the Az number) in elevation as this ratio is typical of full motion antennas. We can also offer an antenna that will provide higher speeds but at increased cost as motors and gearboxes have to be enlarged.

Drive system: Two motors in each axis in torque biased configurations.


Detailed description of 18.3m antenna system

Antenna System OverviewThe Patriot 18.3m antenna system proposed is the largest in the family of antennas in the size range 6.3m to 18.3m. These all use the same basic hub and pedestal design scaled to suit the size as this simplifies the antenna system overall design and saves cost. These antennas use a proven reflector design supported on a rigid pedestal mount that simplifies foundation design. The antenna is normally capable of +/- 270 degrees movement in azimuth, and 0 - 90 degrees in elevation. Advanced inverter drive technology to precisely control antenna position is used and details on the Motor drive / inverters are provided further on in this document. The 12.1m version with a jack elevation system is shown on page 7. The Antenna Structure is a turning head type of pedestal supported by a high-stiffness azimuth bearing. The antenna is capable of mounting a variety of feeds including cryogenic types although no feed is included with this proposal.

The variable frequency AC Drive System proposed is well proven and has been implemented very successfully at a number of sites through Europe and the United States. This state-of-the-art drive control system provides a very reliable and smooth operation.

Equipment Provided

The following major subsystems are included in the proposed system. (Data sheets and/or equipment descriptions can be provided on request).

18.3m Antenna System includes:

o Anchor bolt and template kit

o Aluminum main reflector with Aluminum backing structure

o Composite Sub-reflector and low profile support struts

o Steel antenna tower and pedestal system

o +/-270 degree continuous gear drive azimuth system

o 0 to 90 degree continuous gear drive elevation system

o Turning head assembly, all required bearings and gears etc

o Servo electronics assembly and housing, Interface Kit with AC drive

motors for Azimuth and Elevation. Two motors used in each axis Az and

El for torque biasing.

o Four Unidrive SP inverter drives by Emerson Control Techniques.


o 26 bit Encoders

o Main and backup limit switches and cabling

o Lightning Protection

o Safety platform and ladder for maintenance access

o Installation and assembly supervision at site if required (Additional cost)

o Cable wrap system with sufficient space for cables etc


Foundation The antenna is to be installed on a typical concrete pad with a symmetric circular anchor bolt pattern. Patriot supplies the foundation anchors and template as a kit prior to delivery of the antenna system.

Pedestal AssemblyThe pedestal assembly includes the Turning Head Structure, Elevation and Azimuth Drive Assemblies and Steel Tower. The concept is a simplified Turning Head that provides a more direct load path from the reflector into the steel tower. A large diameter azimuth bearing is attached to the Turning Head base that supports the Turning Head Structure. The Turning Head also provides the interface and pivot for the reflector. All of these structures are constructed of enclosed torque box sections to maximize stiffness and reduce weight – key factors in obtaining good resonant frequency characteristics.

The pedestal is presented in the drawings shown below. A service platform is supplied to provides access to the centre hub to maintain and service the feed and RF components. The platform also provides access to the drive motors, gearboxes, and limit switches. All accesses are available at any orientation of the antenna without interrupting the mission. The motor drive amplifiers and all other local electrical controls are housed inside the pedestal. There is substantial additional space in the pedestal assembly large enough for one full 19 inch rack for additional equipment. The antenna hub is also large enough to accommodate normal RF electronics.


Turning HeadThe Turning Head is a welded box and beam construction with an integrated machined boss to interface with the azimuth bearing/gear assembly. The elevation pillow block mounting surfaces of the Turning Head arms are machined level and parallel to the machined azimuth bearing interface flange of the Turning Head base. In order to speed up field alignment, the Turning Head arm connection to the Turning Head base is designed to be a flange type connection machined parallel to the azimuth bearing mounting flange. The alignment of Turning Head components is verified during shop proof assembly.

The Turning Head base provides machined mounting flanges for the elevation gearboxes, shock absorbers, and stow pin assembly. Special adjusting screws that facilitate jacking the gearboxes to position as well as providing the necessary hold down feature achieve the alignment of the pinions to the elevation gear.

This structure also provides machined mounting pads for azimuth gearboxes. Location of azimuth gearboxes, coupled with external gearing of the azimuth bearing assembly, provides easy access for maintainability of the gearboxes and azimuth gear. Stiffeners are provided at maximum stress points to minimize local distortions. A special feature of this structure is that, because of the machining tolerances achieved in the factory, adjustments of the gearboxes are minimized during field installation. Outboard bearing supports are provided for azimuth and elevation drive pinions in order to increase life and stiffness for the respective drive systems.

Antenna Tower The Antenna Tower is a cylindrical steel weldment with top and bottom flanges. A modified height will be used for this application that still enables a full rack of equipment to be fitted inside the pedestal. It is bolted onto a simple concrete slab foundation with high strength anchor bolts. An internal platform is provided to allow access to the azimuth encoder, cable wrap and cable runs. The support brackets are part of the tower assembly. The tower top flange flatness is controlled to avoid any disturbance to the preloading of azimuth bearing. The verticality alignment of the antenna pedestal is achieved by utilizing the anchor bolts. After the verticality alignment the space between the tower and concrete pedestal is filled with non-shrink grout. The grout provides an additional stiffness to the connection against rocking compliance. See picture below for a view of a typical pedestal.

ReflectorThe antenna reflector back-up structure consists of a rigid hub, precision support trusses and interconnecting lacing. As the antenna must be operable in all elevation angles, the structure has been designed such that it does not significantly distort due to gravitational loadings or wind loadings. The reflector panels are manufactured to very close tolerances by use of industry proven stretch form technology and supported by accurate stringers between truss spans. Panels are cleaned and powder coat painted with a white heat diffusive finish. The panels are designed to survive 125 mph wind loads. The panels are manufactured to a surface accuracy of 0.008 inches rms for use with up to 32 GHz


applications. Dimensional accuracy of the panels is controlled within +/- 0.030 inches to ensure proper fit and panel gaps at assembly.

FeedsA variety of feeds can be fitted to these antennas ranging from conventional communications types from C band to upper Ka band including high performance low cross pol types. For Deep space and astronomy applications cryogenically cooled feeds can be fitted as there is sufficient cable wrap space for the cryogenic tubing etc.

Quadripod and Sub reflector Support The quadripod structure utilizes four rectangular members for support legs which are joined at the apex by the sub reflector support structure. The individual members and resulting assembly are designed for a high stiffness to weight ratio and minimal blockage. The sub reflector can be removed for experimentation purposes etc without distorting the antenna system.

Azimuth Bearing & GearThe azimuth bearing (Rotek) incorporates an integral gear for driving the azimuth axis. A major advantage of this arrangement is the concurrent machining of the gear and bearing to insure concentricity. The bearing is preloaded to eliminate backlash and the gear is manufactured to AGMA standards.

Elevation GearThe elevation drive consists of a gear drive, two torque biased motors and gearbox system to provide long life and that will require minimum maintenance. The gearboxes provide the proper ratio to meet the drive speed requirements.

Elevation Bearings and Pillow BlocksThe elevation stub shafts are supported by self-aligning spherical roller bearings (SKF) with minimal internal clearance. These bearings are housed in fabricated steel pillow blocks designed for strength as well as stiffness, instead of standard cast pillow blocks. The bearings are pre-loaded in the shop by forcing the bearing up the taper of the shaft, thus removing any internal clearance. A lock nut is installed at the end of the shaft resting on the inner flange of the bearing to secure and maintain the pre-load.

Azimuth DriveThe azimuth drive includes an integral pinion, hand wheel with interlocks, fail-safe brake, and AC drive motor and gearbox. The gearbox, uses helical gearing for efficiency, smooth operation and long life. The gearbox uses a submerged oil bath lubrication system with a single all season oil.


The brakes are mounted at the end of the drive assembly for ease of maintenance. Alternatively, they can be through shaft mounted between the motor and gearbox. Mounting of the brakes directly on the gearbox has the advantage that they are available for holding the antenna even if the motors are removed.

Each drive has a hand wheel with two positions, one for operation and one for storage. The operating hand wheel shaft has a safety cover that must be removed before the hand wheel can be installed. Interlocks are provided such that the antenna cannot be operated unless the hand wheel is stowed and the safety cover is in place.

BrakesEach drive is equipped with a spring set electrical release fail-safe brake by Sterns. The brakes are sized to hold the antenna at wind loads up to 100 mph at the stow position. Each brake is provided with an easily accessible manual release to permit hand cranking of the drive.

Manual DriveEach axis is provided with a hand wheel to allow the antenna to be rotated about each axis. When not in use, each hand wheel can be removed and stowed on a storage shaft fitted with an interlock switch. The exposed hand wheel shaft can then be fitted with its safety cover, also equipped with an interlock switch. The antenna can also be driven to stow position using a drill motor.

Electromechanical Limit SwitchesPre-limit and final limit switches are provided on each axis to prevent over travel. For redundancy, pre-limits and final limits are also provided in the software.

The first, or pre-limit, operation prevents application of drive power in the direction of the encountered limit. Final limit switch operation removes power from the drive motors and sets the brakes. The antenna must be hand cranked out of the final limit, the pre and final limit functions are obtained from cam operated switches on each axis. For azimuth, the cams are mounted on the azimuth encoder drive shaft with switches mounted on the tower base near the bottom of the tower. On elevation, the cams mount along the rim of the elevation shaft and limit switches are mounted inside the upper pedestal wall.

Azimuth and Elevation Cable WrapsElectrical cabling that crosses the azimuth axis goes through an azimuth cable wrap that accommodates the antenna azimuth travel. The cable wrap consists of a series of spacer rings along the azimuth axis, which allows the cables to wind around the azimuth axis in a helical manner as the antenna is rotated. The rings are spaced at intervals to prevent the cables from contacting the azimuth back shaft and other structures, thereby precluding cable abrasion. The azimuth cable wrap is capable of carrying all the Patriot supplied cables and customers additional requirements and is conservatively designed to operate well beyond +270 degree antenna azimuth travel. The cable wrap extends from the


bottom of the turning head and down into the antenna tower. Cables coming out of the wrap are routed to cable trays that are mounted inside.

The elevation cable wrap, mounted inboard of one elevation bearing, carries power, customer’s cabling, and signal cables across the elevation axis. One end of the cable bundle is secured to the platform and the other end is clamped to the rotating Reflector Support Structure so that the mid-point of the flex section passes through the elevation axis. The cables are installed so they are straight (unbent) when the antenna is at a 45-degree elevation to keep cable flexure to an absolute minimum. The total unrestricted elevation travel is from -3 to +93 degrees.

Emergency SwitchesA group of emergency switches and a group of safety switches are provided on the antenna for emergency situations and for routine maintenance modes. Emergency interlock drive disable switches are located in the following areas:

a. Elevation drive areab. Azimuth drive areac. Access areas

Drive disable safety switches are provided to disable the drives when the drive system hand wheels are engaged

Operation of any of the safety devices results in removal of drive power from the motors and application of the brakes. The drive systems remain inoperative until the emergency switches are reset or the unsafe condition, e.g. open access hatch, is corrected.

Access and Service Platform LaddersThis antenna is provided with access/service platforms for easy access and maintenance to the various antenna components. The elevation service platform is supported from the yoke base and provides access to service the antenna drives, stow pin, and elevation gear. A third floor platform inside the tower provides access to the cable wrap, the azimuth encoders, limit switches and other accessories.

The platform walk areas are covered with galvanized grating. The ladder and platforms are designed to comply with OSHA regulations and are equipped with handrails and toe plates.

Fasteners All standard fasteners are ASTM A325 high strength. For special connections such as bearings and drive components, Grade 5 or Grade 8 hardware may be used with special corrosion treatment to avoid hydrogen embrittlement.

Fasteners are either shop or field installed utilizing “turn-of-the nut” method to insure proper tension instead of torque wrench that is not reliable and difficult to inspect.


Surface Finish for Structural SteelThe recommended surface finish system for this antenna’s steel structure is hot dip galvanized for all structures where this is practical. For steel structures that are too large or complicated for hot dip galvanizing it is recommended the structures are sand blasted to near white in accordance with prior to painting with a customer approved paint system. All alluminum structures including reflector panels will be painted white in accordance with the customer’s specifications. The antenna components are touched up in the field during installation. A procedure will be issued for the control and inspection of the surface finish, both for shop and field application.

Axes position control electronicsThe current design for speed and position control uses SP Unidrives, micro-processor controlled inverter drives supplied by Emerson Control Techniques. Three drives are used, one for elevation and one for each of the two azimuth motors which are driven in a torque bias mode to eliminate drive train backlash. These drives provide closed loop speed control using feedback from speed encoders fitted to the motor drive shafts.

Closed loop position control is also implemented; this being one of the principal applications of the Unidrive SP inverter drives. Each Unidrive SP has three expansion slots into which various option modules can be fitted. Modules operate on the same clock as the inverter drive and have full access to all drive parameters. The elevation and one of the azimuth drives are fitted with an SM Universal Encoder module that enables it to read the angles output by the Heidenhain elevation and azimuth axis encoders. The data format produced by the encoders is EnDat, which is a four wire serial interface. The basic inverter drive contains firmware for simple position control applications. However for the present purpose it is necessary to fit each drive with Application Modules. These are additional processors hosted by the drives, which are user programmable in Drive Programming Language (DPL). Programmed tasks can be


prioritized, the most time critical (such as position loop operations) are run at the highest level (POS0) whereas the least critical are run as BACKGROUND. The position loops are implemented in Application Module firmware to generate velocity commands that are written to the speed loop resident in the basic drive firmware. The position loop is a PI controller with velocity feed forward. The speed loop with the drive is a PID controller and its torque command output is applied to a PI motor current controller.Elevation and azimuth position command data is read into the Application Module firmware in a variety of formats including analogue voltage or current and all standard machine control serial data protocols such as ModBus, ProfiBus, etc.The position control loops update every 4 ms. Implementing the position loops as proposed has the advantage of using only standard off the shelf components. Also the entire position controller function is run from a single clock eliminating the timing problems often encountered when position and speed loop functions are executed on separate, unsynchronized processors.

Antenna pointing model correctionsPointing corrections can be applied to the angles output from the axes encoders to compensate for the pointing errors introduced by misalignments of the azimuth, elevation, and beam axes, and for gravitational deformation of the antenna structure. The coefficients of the pointing model are stored in the inverter drive Application Modules so that corrections can be applied to the received position commands before being passed to the axes position controllers.

Antenna Pointing Controller InterfaceThe Antenna Controller interface is an Ethernet connection supporting the Modbus TCP/IP protocol. (Modbus via RS485 can also be supported but with less functionality than the Ethernet version.)

A simple control program is provided which runs under Windows and the controller can be readily interfaced to other, e.g. Visual Basic, application programs.

The Ethernet interface allows powerful monitoring and diagnostic software to run alongside the remote control program. (An API allows Controller program updates and modifications to be made remotely.)

Local readout of azimuth and Elevation anglesLocal readout of azimuth and elevation angles is provided on the LCD displays of the inverter drives. Note that these values are corrected for axes misalignments according to the pointing model coefficients stored in the drives.Local position readout is not a high priority task and is therefore carried out as a background task.

Antenna hand held controlA local hand held control facility is provided for maintenance purposes. This comprises a handheld controller connected to the Drive Cabinet by a flexible cable. The handheld


controller only becomes active when the Drive Cabinet is switched to Local control. Switches on the controller allow the antenna to be driven in either axis. A potentiometer is provided for speed control.

Principle Remote Control Modes

STOP Antenna follows a trajectory computed to stop within the minimum distance subject to pre-set speed and acceleration limits

POSITION Elevation and azimuth position setpointsVELOCITY Elevation and azimuth velocity setpointsPOSITION OFFSET Elevation and azimuth position offsets superimposed on to

POSITON, TRACK, or RADEC modes VELOCITY OFFSET Elevation and Azimuth velocity offsets superimposed on to

VELOCITY, TRACK, or RADEC modesTRACK Follow interpolated path between time tagged elevation and

azimuth data which has been downloaded in advance to the Controller (8k points). Time tagged values can also be downloaded ‘on the fly’, provided at least two future points are maintained.

RADEC Tracks a point on the sky from its Right Ascension and Declination

The drive mode can be changed at any time and profile generator algorithms ensure a smooth transition between modes without risk of exceeding the limits of the antenna mechanical systems.

Angle ResolversAntenna azimuth and elevation angles are measured using Heidenhain 26 bit encoders.

Lightning protection:

Finials at the sub reflector support apex and reflector rim, plus conductors to the base of the pedestal are used for connection to the customers lightning earthing system.


Examples of thorough design employed by Patriot Antenna Systems

Finite Element Analysis Capability

Patriot Antenna Systems utilizes the latest computer and software tools to ensure an efficient and accurate design process id used. Mechanical design and drawings are produced on AutoCad and SolidWorks using 3D modelling techniques. Designs are analysed and verified on ANSYS analysis software along with a number of in house programs for mechanical and wind load analysis. Our RF expertise is aided by use of the latest in software including HFSS and OSU design software. Patriot’s extensive mechanical and RF capability combined with the latest computer tools provide it’s customers with both innovative and cost effective solutions.

Theodolite and photogrammetry techniques are employed to measure the antenna surfaces.

Locked Rotor Frequency is expected to be excess of 2Hz

Full life, stress analysis and pointing error analysis can be conducted for a particular application

This 12m Antenna design has recently passed the NASA PDR, CDR and acceptance test stages


Examples:Wind Pressure Distribution - ANSYS

Members Stresses - ANSYS


Typical Laser Tracker and Photogrametry Surface Measurements

DocumentationPatriot uses the latest in computer-aided design. A library of previous documentation allows the project engineer to efficiently produce new high quality documentation for each project. In addition Patriot has a complete drafting and design department staffed by expert designers equipped with Solid-works and AutoCAD workstations. All documentation will be prepared in accordance with good commercial practice. Both text and illustrations will be of good quality. Drawings will be fully legible and can be cleanly reproduced. The final handbooks and documentation will be delivered in rugged binders that are suitable for heavy use at the earth station. Patriot Antenna Systems Inc. will supply all Operation and Maintenance documentation required to operate and maintain the antenna system and associated equipment. Documentation will be supplied both electronically and via hard copy (or as required).

Quality ProgramPatriot is committed to the highest quality standards. At Patriot, “prevention” is an underlying concept. The concepts of working to prevent problems, and training people to build the quality into their work, whether it be wiring or engineering, are cornerstones of our philosophy. An Internal Design Review Process is one of the “prevention” processes built into the Project Management Process.


Program Management ServicesThe primary mission of Patriot is the provision of high quality antenna products. In many cases this includes services and activities well beyond building and delivering an antenna. Most projects involve design, coordination, installation, training and testing that require working closely with the customer for proper planning and implementation. In these cases a Project Manager is assigned and a Project Management Plan developed to guide the activities. The Project Management Plan assures Patriot management and the customer that the program has clearly defined requirements, acceptance criteria, buyer/seller responsibilities, project schedule, budget, cash flow plan and manpower staffing plan. Patriot utilizes computer aided project management tools to assure consistency between all projects and assure all project requirements are properly accounted for. These tools allow management to aggregate all manpower requirements across all of Patriot’s current projects and aids in planning future resource needs. All the documents that result from implementing the Program Management Plan (PMP) are computer generated and based on inputs from the Project Manager and the Project Team.The Project Manager is fully responsible for meeting the requirements of the contract, and meeting the customer’s expectations. Team members are assigned to the Project Manager and are expected to meet his (or her) expectations as long as they are part of that project team. The Project Manager is assigned resources as required to provide the skills needed to complete the contractual requirements.

Spare partsA complete set of spare parts for future maintenance and repair of the antenna system are available from Patriot Antennas Systems, Inc. Procedures for installation of replacement parts are detailed in the antenna Operations and Maintenance Manual.

TestingPatriot Antenna Systems, Inc. will carry out a series of on site acceptance tests to verify that the delivered system meets the performance requirements for this project. Patriot expects to work with their customers to jointly determine an antenna acceptance test plan.

Warranty and maintenanceAll equipment supplied shall be warranted for a period of one year following installation and successful testing of the antenna system. A full recommended maintenance schedule is in the operations and maintenance manual supplied with the antenna. Maintenance services can be provided if requested.

MaintainabilityAll Patriots larger antennas are designed to allow quick and easy access to the maintenance locations on the antenna. The drives are readily accessible for routine maintenance and inspection. Location of the motors and brakes also provides for easy access and maintenance. The azimuth bearing grease fittings are located on the inside of the bearing race and are accessed from the upper platform located inside the pedestal tube.


Some of Patriots Antenna systems facilities


7.5 and 9.4m Antenna during assembly



Patriot’s 9.4m Antenna with hot air de-ice system

on customers pedestal.

Patriot’s 12m Antenna and pedestal showing some of the unique maintenance features

Easily accessible motors and gearboxes

Easily replaceable jack system, no crane requiredIn pedestal

electronics

Completed 12.1m antenna at Patriot, for the DSN Array


Patriot Antenna Systems

Budgetary price proposals

18.3m antenna system.

18.3m antenna system suitable for use at 15GHz

Price each in USD

Qty 1 $850,000

All the above prices are FOB Albion Mi.

Price for installation (Excluding foundation/civil works): $115,000 USD per antenna

Price for transportation to site, $35,000 per antenna. Antenna ships in standard 40ft shipping containers, 3 per antenna. Delivery, can commence 8-10 months ARO.

Payment terms TBA, payment milestones will be required.

Summary:We hope that the above is sufficient to demonstrate Patriot Antenna Systems competitive capabilities and we look forward to firming up this price quotation and supplying a suitable antenna system. Yours sincerely

Peter ShieldFor Patriot Antenna Systems


Proprietary noticeThe data and prices contained within this document are the proprietary data of Patriot Antenna Systems Inc. Neither the document nor the information contained within shall be used, reproduced, or disclosed to others without the written authorization of Patriot Antenna Systems Inc.

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